JPH0397344U - - Google Patents
Info
- Publication number
- JPH0397344U JPH0397344U JP440290U JP440290U JPH0397344U JP H0397344 U JPH0397344 U JP H0397344U JP 440290 U JP440290 U JP 440290U JP 440290 U JP440290 U JP 440290U JP H0397344 U JPH0397344 U JP H0397344U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- operational amplifier
- output terminal
- input terminal
- supplies
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000001105 regulatory effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
- 230000005669 field effect Effects 0.000 description 1
Landscapes
- Continuous-Control Power Sources That Use Transistors (AREA)
Description
第１図はこの考案の第１の実施例である電源回
路を示す回路図、第２図はこの考案の第２の実施
例である電源回路を示す回路図、第３図は従来の
技術を示す回路図である。
１，２……演算増幅器、３，４……トランジス
タ、５……電界効果トランジスタ、６……スイツ
チ。
Fig. 1 is a circuit diagram showing a power supply circuit which is the first embodiment of this invention, Fig. 2 is a circuit diagram showing a power supply circuit which is a second embodiment of this invention, and Fig. 3 is a circuit diagram showing a power supply circuit which is a second embodiment of this invention. FIG. 1, 2... operational amplifier, 3, 4... transistor, 5... field effect transistor, 6... switch.
Claims (1)
給するトランジスタのベース電流を演算増幅器の
出力端子から供給する電源回路において、前記演
算増幅器の一方の入力端子と安定化電源出力端子
間に基準電源を接続し、前記演算増幅器の他方の
入力端子をスイツチによりグランドまたは前記基
準電源の電圧以上の電圧を有する電源に接続する
ことによりオンオフする電源回路。 In a power supply circuit that supplies a base current of a transistor that supplies current from an unstable power supply to a regulated power supply output terminal from an output terminal of an operational amplifier, a reference power supply is connected between one input terminal of the operational amplifier and the regulated power supply output terminal. and the other input terminal of the operational amplifier is turned on and off by connecting the other input terminal of the operational amplifier to ground or a power source having a voltage higher than the voltage of the reference power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP440290U JP2511865Y2 (en) | 1990-01-22 | 1990-01-22 | Power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP440290U JP2511865Y2 (en) | 1990-01-22 | 1990-01-22 | Power supply circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0397344U true JPH0397344U (en) | 1991-10-07 |
| JP2511865Y2 JP2511865Y2 (en) | 1996-09-25 |
Family
ID=31508148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP440290U Expired - Lifetime JP2511865Y2 (en) | 1990-01-22 | 1990-01-22 | Power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2511865Y2 (en) |
-
1990
- 1990-01-22 JP JP440290U patent/JP2511865Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2511865Y2 (en) | 1996-09-25 |